Looper-carrier for sewing-machines.



J. R. MOFFATT.

LOOPER CARRIER FOR SEWING MACHINES.

APPLICATION FILED JUNB23, 1909.

1,1 13,81 3. Patented Oct. 13, 1914. fiu Q .I 2 fli 2a iii/E R. MOFFATT,OF CHICAGO, ILLINOIS, ASSIGNOR TO UNION SPECIAL MACHINE COMPANY, OFCHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

LOOKED-CARRIER FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented Oct. 13, 1914.

Application filed Iime 23,1908. Serial lIo. 503.844.

To all whomz't may concern:

lle it known that 1, JAMES R. MOI-FA'I'I, a citizen of the UnitedStates, residing at (.hicago, in the county of Cook, State of lllinois,have invented certain new and usetill Improvements in Looper-Carr1ersfor A. further pbject of the invention is to' provide a looper carrierwith means for so porting a plurality of loopers so that t e beaks ofthe loopers are in substantially the same horizontal plane when enteringthe needle loops.

In the drawings which show by way of illustration one embodiment of myinvention; Figure 1 is a front view of the looper carrier with myimproved means of sup orting the loopers. Fig. 2 is a view 0 the samelookin at the beaks of-the loopers. Fig. 3 is a iagrammatic view showingthe manner of inclinin one of the loo rs relative to the other. ig. tiea top p an view of the looper carrier with the loopers removed. Fl 5 isa similar view with the; loopers in p ace. Fig. 6 is a view similar toFig. 2, with the loopers moved laterally. Fig. 7 is a side view of theloopers.

My improved looper carrier may be used in connection with any chainstitch machine, but is designed more especially for use in connectionwith the Union Special type of machine. The looper carrier is intendedto be mounted on a looper rocker and is vibrated so thatthe loopers are'ven a forward and backward movement into and out of the needle. loopsand a lateral needle avoiding movement.

When four loopers are mounted in a looper carrier and each loopercooperates with a separate needleindicated by the line in, Fig. 1, saidloopers must necessarily be located very close together as the needles,if the looper is vibrated in a direction at right angles to thedirection of the feed, must be set in a line or lines diagonal to theline of feed.

'In order that the fabric may be readily manipulated, it is desirablethat the line of the needles shall be as near as ossible to a right linecrossing the line of eed. In order that the loopers may be brought closetogether, I have provided a looper carrier 1. which has a plurality ofsockets 2, 3, i and 5 to receive the shanks of the loopers l. The loopercarrier is provided with the usual bearing 6, which may be mounted on astud carried by the looper rocker. The manner of mounting the looperrocker is of the usual construction and will not 'need furtherdescription. ceive the rear pair of loopers. The centers The sockets 2and 3 reof the sockets 2 and 3 are located in planes cutting the axis ofthe loo er atright an les which are close together, but not mind cut sothat when the loopers 7 and 8 are fitted in 'said sockets 2 and 3, theywill lie close together. The sockets 4 and 5 are disposed relative tothe axis of the looper similar to the sockets 2 and 3 and are alsolocated relative to the sockets 2 and 3 slightly at one side thereof.This staggered arrangement of the sockets for the loopers not onlyallows each looper of the pairs to be brought close together, but alsoallows the pairsof loopers to be brou ht close together.

It is desira-b e that the eyes of the needles should be arrangedsubstantially the same distance from the work, support and in order thatthe loopers may propel-l coopcrate with the needles, the beaks of t eloopers when entering the needle loops shou d be substantially in the'same horizontal plane.

Where four loopers are set abreast and are vibrated laterally to avoidthe needle in the arc of a circle indicated by the line yy Fig. 2, itwill readily be seen that if the loopers are set so that one of theloopers or one pair of the loopers are; in

position to cooperate with the needles, the

other loopers if arranged the same distance from the looper carrier,would .not be in proper position to cooperate with the needles. This isdue to the fact that the loopers are moving laterally in an arc of smallradius, while the four loopers coverconsiderable lateral space.- It isobjectionable to make two of the loo rs of special construction so as toproperly position the beaks of all the loopers for the reason thatwhen'the loopers are changed, there would be much confusion 1n selectingthe right loopers for the proper sockets.

I have found that by inclining the sockets 4 and 5 slightly relative tothe sockets 2 and 3 as shown diagrammatically in Fig. 3, I am able toraise the beaks of the loopers of the frontl pair so that they will beproperly located and lie in substantially the same horizontal lane (seeline a-z Fig. l and line iE--l7 Fig. 2) when the beaks of theloopers'are entering the needle loops.

The essential feature is to properly locate the beak of the looper sothat it will with certainty enter the needle loop and it is immaterialif thebody portion of one pair of the loopers is inclined more than theother pair. By inclining the sockets of the front pair of loopers and bythe staggered arrangement of sockets, I am able to bring my loopersclose together and properly locate the beaks thereof so that they willwith certainty, enter theneedle loops. The setting of the loopers 3 and5 slightly in rear of the loopers 2 and 4 respectively, and the tiltingof the loopers 4 and 5 relative to the loopers 2 and 3, will cause theextreme upper portions of the loopers which are nearest the worksupport, just before the loopers are moved laterally to lie in diiferenthorizontal planes as clearly shown in Figs. 2 and 7 of the drawing.

In Fig. 2 the work support is indicated by W and it will be seen thatthe left hand looper is farther from the work support than the righthand looper. This arrangement of the loopers is of great advantage forthe reason thatwhen the loopers swing laterally to the position shown inFig. 6, the left hand looper will not be moved up so as to strike thework support. This arrangement of the loopers would be of equaladvantage where the loopers move close to any fixed element, as it givesample room for t e lateral swinging of the looper.

Having thus particularly described my invention, what I claim as new anddesire to secure by Letters Patent is 1. A looper carrier having aplurality of pairs of looper-receiving sockets staggered relative toeach other,whereby the pairs of loopers carried therein may be broughtclose together.

2. The combination of a looper carrier and a plurality of looperssupported thereon and arranged in parallel relation to each other, saidcarrier being formed with sockets for the respective looper shanks, thesocket for the rearmost looper shank being staggered relative to thesockets for the looper shanks immediately in front thereof whereby theloopers carried therein may be brought close together.

3. A looper carrier provided with a plurality of sockets stag eredrelative to one another, the centers 0 which are arranged in separateparallel planes at right angles to the pivotal axis of the carrier,which planes are located close to each other.

4. A looper-carrier provided with a plurality of sockets stag eredrelative to one another, the centers 0 which are arranged in separateparallel planes at right angles to the pivotal axis of the carrier,which lanes are located close together, the center ines of said socketsbeing inclined relative to each other, whereby similar loopers mountedin said sockets may be positioned so that the beaks thereof are insubstantially the same horizontal plane at the time of enter-in theneedle loops.

5. A ooper carrier having a plurality of fixed sockets formed therein,said sockets being located side by side and extending in the samegeneral direction, a plurality of similar loopers mounted in saidsockets and extending in substantially the same direction with theirbeaks side by side, said sockets also having their center lines inclinedrelative to each other, whereby said loopers are positioned so that thebeaks thereof are in substantially the same horizontal plane at the timeof entering the needle loops.

6. A looper carrier, a fixed element located on oneside of said loopercarrier, a plurality of loopers carried thereby, means to vibrate androck said loopers and said carrier, said loopers having their extremeupper portions arranged at different distances from the axis of thelooper carrier, whereby the loopers may be rocked in a directionopposite to their length and without interfering with said fixed elementIn testimony whereof I aflix my signature, in presence oftwo witnesses.

JAMES R. MOFFATT.

Witnesses C. MGNEIL, JULIUS Saran.

